Probably Paris Saint German fans would still have Lionel Messi more than they detest him before as he just advice Kylian Mbappe to leave Paris Saint German and go to Spain if he want to win UEFA trophy. When Messi won World Cup, Paris Saint German fans matched his jersey at club in France, means they don't even for once like him, now that he has advice Mbappe to leave the club, they would hate him more and more because Mbappe is still their phase in both France squad and Paris Saint German.
It's not only the Paris Saint German fans that would hate Lionel Messi, even the owners would hate Lionel Messi because he is the one that fetch them money most among the players but Lionel Messi don't have problem, even the two seasons he spent with them is like uncomfortable with him and as they didn't meet up to their bargain and his expectations that if they win championships League, he would wait, he has left for Major league soccer in America and as he's leaving, his fans follows, Paris Saint German has lost millions of followers as Messi announced his departure.
It's all left to Kylian Mbappe now, Messi confined in him that he's a good player and that's why he gave him some advice, he didn't even tell him to go to Barcelona because Barcelona didn't have enough money to buy player now, the players they are having are players that their price ain't hike, Ilkay Gundogan left on a free agent to Barcelona, even Messi could not return to Barcelona because Barcelona don't have enough money to pay his weekly allowance, so he advised him to go to Real Madrid and if he want to go, he should go now. I think he advice him to go now because there may be chances of winning any UEFA trophy within 3 seasons.
If Kylian Mbappe don't want to look at the money that Paris Saint German would still offer him more in order to stay, he should leave the club now or keep having the money, the choice is left to him, Lionel Messi has bagged up 7 balon Do'r, he keep having money as he win awards, making record and breaking records, money run after him.
Mbappe type players always suitable for Real Madrid. But Barcelona also be a good choice !